FIGURE 2- 3 -Refer to Figure 2- 3. the Slope of Curve a of Curve

Multiple Choice

FIGURE 2- 3
-Refer to Figure 2- 3. The slope of curve A is

A) positive and variable.
B) positive from X1 to X2 and negative from X2 to X3.
C) zero.
D) negative from X1 to X2 and positive from X2 to X3.
E) negative and variable.